The BMW 1M Coupe is not exactly something you would call slow. It's a respectable car in stock form but the video below shows the difference between a quick car and fast car. Not much of a race as the Porsche simply blows the 1M away like it is standing still. The 911 Turbo is a first generation 997 Turbo with a SpeedArt BTR600 package so likely just a tune and exhaust modifications. The 911 Turbo also has a manual transmission.

Maybe the guy in the Porsche is just a better driver?
Maybe the guy in the 1M had is hand brake on or his foot slightly riding the clutch?
Maybe the guy in the 1M missed a gear or two?
Maybe ..........

C'mon, this was silly. In fact it's just sad to know that all that loose gravel marked the front of that 1M.